Both mackerel and tunas belong to the Scombridae family, but SITC separates them: tunas and skipjack fall under 03414, while mackerel (scombrids other than tunas and bonito) fall under 03417. The distinction turns on genus and species — importers should ensure commercial invoices and packing lists identify the species by scientific name to support correct classification.

FDA requires importers of scombroid fish to have a HACCP plan that identifies histamine formation as a significant hazard and includes critical control points for time-temperature management. Importers must also verify that their foreign suppliers have equivalent controls in place. Shipments without adequate HACCP documentation are subject to detention and refusal. Consult a licensed customs broker or regulatory counsel for current compliance requirements.